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<?php |
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/** |
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* This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony). |
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* |
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* Copyright (C) 2019 - 2020 Jan Böhmer (https://github.com/jbtronics) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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namespace App\Services\Parameters; |
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use App\Entity\Parameters\AbstractParameter; |
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use App\Entity\Parameters\PartParameter; |
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class ParameterExtractor |
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{ |
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protected const ALLOWED_PARAM_SEPARATORS = [", ", "\n"]; |
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protected const CHAR_LIMIT = 1000; |
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/** |
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* Tries to extract parameters from the given string. |
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* Useful for extraction from part description and comment. |
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* @param string $input |
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* @param string $class |
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* @return AbstractParameter[] |
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*/ |
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public function extractParameters(string $input, string $class = PartParameter::class): array |
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{ |
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if (!is_a($class, AbstractParameter::class, true)) { |
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throw new \InvalidArgumentException('$class must be a child class of AbstractParameter!'); |
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} |
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//Restrict search length |
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$input = mb_strimwidth($input,0,self::CHAR_LIMIT); |
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$parameters = []; |
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//Try to split the input string into different sub strings each containing a single parameter |
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$split = $this->splitString($input); |
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foreach ($split as $param_string) { |
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$tmp = $this->stringToParam($param_string, $class); |
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if ($tmp !== null) { |
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$parameters[] = $tmp; |
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} |
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} |
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return $parameters; |
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} |
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protected function stringToParam(string $input, string $class): ?AbstractParameter |
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{ |
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$input = trim($input); |
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$regex = '/^(.*) *(?:=|:) *(.+)/u'; |
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$matches = []; |
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\preg_match($regex, $input, $matches); |
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dump($matches); |
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if (!empty($matches)) { |
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[$raw, $name, $value] = $matches; |
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$value = trim($value); |
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//Dont allow empty names or values (these are a sign of an invalid extracted string) |
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if (empty($name) || empty($value)) { |
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return null; |
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} |
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/** @var AbstractParameter $parameter */ |
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$parameter = new $class(); |
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$parameter->setName(trim($name)); |
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$parameter->setValueText($value); |
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return $parameter; |
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} |
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return null; |
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} |
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protected function splitString(string $input): array |
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{ |
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//Allow comma as limiter (include space, to prevent splitting in german style numbers) |
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$input = str_replace(static::ALLOWED_PARAM_SEPARATORS, ";", $input); |
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return explode(";", $input); |
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} |
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} |
Part-DB /
Part-DB-symfony
